Add a referrer class to be used in the browser process whenever passing around referrsr

content/content_common.gypi

 # Copyright (c) 2011 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'dependencies': [
     '../base/base.gyp:base',
     '../build/temp_gyp/googleurl.gyp:googleurl',
     '../gpu/gpu.gyp:gpu_ipc',
     '../ipc/ipc.gyp:ipc',
@@ skipping 33 matching lines @@
     'public/common/frame_navigate_params.h',
     'public/common/gpu_info.cc',
     'public/common/gpu_info.h',
     'public/common/main_function_params.h',
     'public/common/page_transition_types.cc',
     'public/common/page_transition_types.h',
     'public/common/page_type.h',
     'public/common/page_zoom.h',
     'public/common/pepper_plugin_info.cc',
     'public/common/pepper_plugin_info.h',
+    'public/common/referrer.h',
     'public/common/renderer_preferences.cc',
     'public/common/renderer_preferences.h',
     'public/common/resource_dispatcher_delegate.h',
     'public/common/result_codes.h',
     'public/common/sandbox_init.h',
     'public/common/security_style.h',
     'public/common/serialized_script_value.cc',
     'public/common/serialized_script_value.h',
     'public/common/show_desktop_notification_params.cc',
     'public/common/show_desktop_notification_params.h',
@@ skipping 257 matching lines @@
       ],
       'link_settings': {
         'libraries': [
           '-lEGL',
           '-lGLESv2',
         ],
       },
     }],
   ],
 }